With 2.4 GHz Radio Frequency technology, the Adesso iMouse E30 Wireless Vertical Righthanded Ergonomic Mouse provides you with wireless convenience and the freedom of a smooth connection for up to a 30-foot range without tangled cables. This ergonomic mouse is designed with a vertical orientation and a contoured shape that provides a uniquely comfortable user experience. With this wrist-friendly contour support, you will hold your hand in a healthy handshake position which is the neutral position of your forearm as opposed to the twisted forearm position as with a regular mouse.